package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {

    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut(){}


    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint){
        log.info("开始进行数据填充");
        //获取数据库操作类型
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        AutoFill autoFill =signature.getMethod().getAnnotation(AutoFill.class);
        OperationType operationType=autoFill.value();
        //获取拦截方法参数（实体对象）
        Object[] args=joinPoint.getArgs();
        if(args==null||args.length==0){
            return;
        }
        Object entity=args[0];
        //准备赋值的数据
        LocalDateTime now= LocalDateTime.now();
        Long currentId= BaseContext.getCurrentId();

        //通过反射赋值
        if(operationType==OperationType.INSERT){
            try {
                Method setCreateTime=entity.getClass().getDeclaredMethod("setCreateTime",LocalDateTime.class);
                Method setUpdateTime=entity.getClass().getDeclaredMethod("setUpdateTime",LocalDateTime.class);
                Method setCreateUser=entity.getClass().getDeclaredMethod("setCreateUser",Long.class);
                Method setUpdateUser=entity.getClass().getDeclaredMethod("setUpdateUser",Long.class);

                setCreateTime.invoke(entity,now);
                setUpdateTime.invoke(entity,now);
                setCreateUser.invoke(entity,currentId);
                setUpdateUser.invoke(entity,currentId);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }else if (operationType==OperationType.UPDATE){
            try{
                Method setUpdateTime=entity.getClass().getDeclaredMethod("setUpdateTime",LocalDateTime.class);
                Method setUpdateUser=entity.getClass().getDeclaredMethod("setUpdateUser",Long.class);

                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);
            }catch(Exception e){
                e.printStackTrace();
            }
        }
    }


}
